Tap Drill Size Chart

7.1 mm Drill Size

metric drill

7.1 mm 0.2795 in 7.10 mm

A 7.1 mm drill measures 0.2795 in. It taps 4 threads in this chart.

What a 7.1 mm drill taps

Every thread this drill cuts between 50% and 85% of thread, deepest first. Outside that band it is the wrong drill for the job, so nothing below that line is listed.

Threads a 7.1 mm drill taps, with the percent of thread each one gets and the published chart drill for comparison.
Thread % thread Chart drill Chart %
5/16-32 81.3% 9/32″ 77.1%
M8 x 1 69.3% 7 mm 77.0%
5/16-24 61.0% I 74.8%
M8 x 1.25 55.4% 6.8 mm 73.9%

Drills either side

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7.1 mm drill: common questions

What size is a 7.1 mm drill?
0.2795 inches, which is 7.10 mm. It is a metric drill.
What can I tap with a 7.1 mm drill?
4 threads: 5/16-32 at 81.3%, M8 x 1 at 69.3%, 5/16-24 at 61.0%, M8 x 1.25 at 55.4%.
What drill is next to a 7.1 mm?
Down: J at 0.277 in. Up: K at 0.281 in.